CN213969905U

CN213969905U - Assembling device for machining of workbench assembly

Info

Publication number: CN213969905U
Application number: CN202022494353.5U
Authority: CN
Inventors: 杜琪
Original assignee: Wuxi Daye Electric Appliance Co ltd
Current assignee: Wuxi Daye Electric Appliance Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-08-17
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses an assembly quality is used in processing of workstation subassembly, the desk comprises a desktop, a plurality of first pillars of upper surface left end fixedly connected with of desktop, and the upper surface of desktop is located a plurality of first boxes of right side fixedly connected with of first pillar, the upper surface of desktop is located the right side of first box and installs the switch of falling in the same direction as, the upper surface of desktop is located a plurality of second pillars of rear side fixedly connected with of the switch of falling in the same direction as, and is a plurality of be equipped with first connecting rod, a plurality of be equipped with the dead lever between the first box, the one end fixedly connected with support frame of dead lever is kept away from to the bottom inner wall of first box, the upper end internal surface of support frame rotates and is connected with first pivot, the external fixed surface of first pivot is connected with the gear. The utility model discloses a workstation has the function of revising the work piece that has the deviation when carrying out the work piece assembly, and the height-adjustable of workstation is simultaneously used more.

Description

Assembling device for machining of workbench assembly

Technical Field

The utility model relates to a workstation technical field especially relates to an assembly quality is used in workstation subassembly processing.

Background

The workbench is used for assembling various workpieces and becomes an indispensable working device in current industrial production, however, most of the workbench on the current market has single function, only one table is used for assembling the workpieces, the height of the workbench cannot be well adjusted, and the workpieces are difficult to correct when being assembled, so that the workpieces which are forcibly assembled can have potential quality hazards.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an assembling device for machining a workbench component.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an assembly device for machining a workbench component comprises a desktop, wherein the left end of the upper surface of the desktop is fixedly connected with a plurality of first supporting columns, the right side of the first supporting columns is fixedly connected with a plurality of first box bodies, the right side of the first box bodies is provided with an up-down switch, the rear side of the up-down switch is fixedly connected with a plurality of second supporting columns, a first connecting rod is arranged between the first supporting columns, a fixing rod is arranged between the first box bodies, one end, far away from the fixing rod, of the inner wall of the bottom of the first box body is fixedly connected with a supporting frame, the inner surface of the upper end of the supporting frame is rotatably connected with a first rotating shaft, the outer surface of the first rotating shaft is fixedly connected with a gear, one side, close to the fixing rod, of the first box body is provided with a second lifting hole, and a position, close to the second lifting hole, of the inner wall of the bottom of the first box, the inner part of the limiting cylinder is provided with a lifting column, one side of the lifting column close to the gear is provided with a plurality of tooth sockets, the bottom of one side of the lifting column close to the second lifting hole is fixedly connected with a fixed rod, one end of the first rotating shaft far away from the first box body is fixedly connected with a crank, one end of the crank far away from the first rotating shaft is rotatably connected with a rotating sleeve, the lower surface of the fixed rod is provided with a first rubber pad, the lower surface of the first connecting rod is provided with a lamp, the outer surface of the upper end of the first supporting column positioned at the front side is provided with a lamp switch, a plurality of second supporting columns are rotatably provided with a lead screw therebetween, a plurality of second connecting rods are fixedly connected between the second supporting columns, the outer surfaces of the lead screw and the second connecting rods are provided with the same connecting block, the lower surface of the connecting block is provided with a second box body, the inner part of the second box body is provided with a first motor, one side of the first motor is rotatably connected with a second rotating shaft, the utility model discloses a table top, including first motor, first pivot, second box, front side, second pillar, first motor, second pivot, cutter hole, sword groove, cutter hole, front side, second motor, second pivot, the one end fixedly connected with cutter that first motor was kept away from in the second pivot, the position that the lower surface of second box is close to the cutter has been seted up, the position that the upper surface of desktop is close to the cutter has been seted up the sword groove, is located the front side fixedly connected with third box of second pillar, the inside of third box is equipped with the second motor, the upper surface right-hand member of desktop is equipped with the fixing base, the last fixed surface of fixing base installs the third motor, the right-hand member of third motor rotates and is connected with the fourth pivot, the external fixed surface of fourth pivot installs the emery wheel.

Preferably, one side of the limiting cylinder, which is close to the gear, is provided with a meshing hole, and one side of the limiting cylinder, which is close to the second lifting hole, is provided with a first lifting hole.

Preferably, the crank is in an L-shaped structure, the reversing switch is electrically connected with the second motor, the reversing switch is HY23 in type, and the lamp switch is electrically connected with the lamp.

Preferably, the second connecting rod is located below the lead screw, the second connecting rod is connected with the connecting block in a sliding mode, and the lead screw is connected with the connecting block in a threaded mode.

Preferably, one side of the second motor, which is close to the screw rod, is rotatably connected with a third rotating shaft, and the third rotating shaft is fixedly connected with the screw rod.

Preferably, the four corners of the lower surface of the table top are fixedly connected with supporting legs, and second rubber pads are arranged at the lower ends of the supporting legs.

Preferably, the equal fixedly connected with support column in lower surface four corners position of desktop, four the sleeve has all been cup jointed to the lower extreme surface of support column, a plurality of fixed orificess have all been seted up to support column and telescopic internal surface, telescopic lower extreme is equipped with the second rubber pad, and the fixed orifices on the sleeve is inside to be equipped with the fixed pin, the shape of fixed pin is the U-shaped structure.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, through having set up the second pillar, the second connecting rod, the lead screw, the second pivot, cutting knife and first motor have increased the function of cutting the work piece for the workstation, can cut the correction to the work piece that the size has the deviation, so that can assemble better, avoid because the quality hidden danger that the forced assembly caused, regulate and control the positive and negative rotation of second motor and then control the turning of lead screw through the switch of reversing and reversing, make the connecting block can drive the reciprocating motion of second box, and then realize the reciprocating cutting motion of cutting knife, the first pillar, first connecting rod and lamp make the workstation can provide excellent assembly environment through the illumination;

2. the utility model discloses in, through having set up first box, the dead lever, the lift post, the tooth's socket, the gear, the support frame, first pivot and crank have increased the function that machinery steps up for the workstation, when carrying out the correction of plate work piece, can step up through the dead lever, when using manpower sparingly, the security has been improved, the swivel sleeve makes the rotation of crank more convenient, when first rubber pad can protect the work piece, prevent the work piece slippage when cutting, in addition fixing base, third motor, fourth pivot and emery wheel have increased the function that can carry out the finish to the work piece for the workstation, especially carry out the work piece after cutting, can polish through the emery wheel, make the cutting opening level and smooth, when convenient the assembly, cutting opening fish tail workman has been avoided;

3. in the utility model, the height adjusting function is added to the workbench by arranging the supporting columns, the sleeves, the fixing holes and the fixing pins, and the U-shaped fixing pins can be simultaneously inserted into the two fixing holes, so that the connection between the supporting columns and the sleeves is more stable, and the safety is improved;

to sum up, the utility model discloses a workstation has carries out the function of revising to the work piece that has the deviation when carrying out the work piece assembly, and the height-adjustable of workstation is simultaneously used more.

Drawings

Fig. 1 is a front view of a first embodiment of an assembling device for machining a workbench component, which is provided by the present invention;

FIG. 2 is a cross-sectional view of a table top of the assembling device for machining a working table component according to the present invention;

fig. 3 is a cross-sectional view of a first box of the assembling device for machining the working table component, which is provided by the utility model;

fig. 4 is an installation schematic view of a rotating sleeve of the assembling device for machining the working table component, which is provided by the utility model;

fig. 5 is a cross-sectional view of a second box of the assembling device for machining the working table component, which is provided by the utility model;

fig. 6 is a schematic view illustrating the installation of the fixing rod and the first rubber pad of the assembling device for machining the working table component according to the present invention;

fig. 7 is a front view of a second embodiment of the assembling device for machining a workbench assembly according to the present invention.

In the figure: 1 desktop, 2 first pillars, 3 first box, 4 reversing switch, 5 second pillars, 6 fixed pins, 7 first connecting rods, 8 supporting frames, 9 first rotating shafts, 10 gears, 11 limiting cylinders, 12 lifting columns, 13 tooth spaces, 14 fixed rods, 15 meshing holes, 16 first lifting holes, 17 second lifting holes, 18 crank handles, 19 rotating sleeves, 20 first rubber pads, 21 lamps, 22 lamp switches, 23 lead screws, 24 second connecting rods, 25 connecting blocks, 26 second box, 27 first motors, 28 second rotating shafts, 29 cutting knives, 30 knife holes, 31 knife grooves, 32 third box, 33 second motors, 34 third rotating shafts, 35 fixed seats, 36 third motors, 37 fourth rotating shafts, 38 grinding wheels, supporting

legs

39, 40 second rubber pads, 41 supporting columns, 42 sleeves and 43 fixing holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

The first embodiment is as follows:

referring to fig. 1-6, an assembling device for machining a workbench component comprises a table top 1, wherein a plurality of first supporting columns 2 are fixedly connected to the left end of the upper surface of the table top 1, a plurality of first box bodies 3 are fixedly connected to the right side of the first supporting columns 2, a reversing switch 4 is installed on the right side of the first box bodies 3 on the upper surface of the table top 1, a plurality of second supporting columns 5 are fixedly connected to the rear side of the reversing switch 4 on the upper surface of the table top 1, first connecting rods 7 are arranged among the first supporting columns 2, fixing rods 14 are arranged among the first box bodies 3, a supporting frame 8 is fixedly connected to one end, far away from the fixing rods 14, of the inner wall of the bottom of each first box body 3, a first rotating shaft 9 is rotatably connected to the inner surface of the upper end of the supporting frame 8, a gear 10 is fixedly connected to the outer surface of the first rotating shaft 9, a second lifting hole 17 is formed in one side, close to the fixing rods 14, of the first box bodies 3, a limiting cylinder 11 is arranged at a position, close to a second lifting hole 17, of the inner wall of the bottom of the first box body 3, a lifting column 12 is arranged inside the limiting cylinder 11, a plurality of tooth grooves 13 are formed in one side, close to the gear 10, of the lifting column 12, the bottom of one side, close to the second lifting hole 17, of the lifting column 12 is fixedly connected with a fixing rod 14, one end, far away from the first box body 3, of the first rotating shaft 9 is fixedly connected with a crank 18, one end, far away from the first rotating shaft 9, of the crank 18 is rotatably connected with a rotating sleeve 19, a first rubber pad 20 is arranged on the lower surface of the fixing rod 14, a lamp 21 is arranged on the lower surface of the first connecting rod 7, a lamp switch 22 is arranged on the outer surface of the upper end of the first support 2, located on the front side, a lead screw 23 is rotatably arranged among a plurality of second support columns 5, a plurality of second connecting rods 24 are fixedly connected among the second support columns 5, and the lead screw 23 and the same connecting block 25 is arranged on the outer surfaces of the second connecting rod 24, the lower surface of the connecting block 25 is provided with a second box body 26, the inside of the second box body 26 is provided with a first motor 27, one side of the first motor 27 is rotatably connected with a second rotating shaft 28, one end of the second rotating shaft 28 far away from the first motor 27 is fixedly connected with a cutting knife 29, the function of cutting workpieces is added for a workbench, workpieces with different sizes can be cut and corrected, so that the workpieces can be better assembled, the quality hidden trouble caused by forced assembly is avoided, the lower surface of the second box body 26 is provided with a knife hole 30 at the position close to the cutting knife 29, the upper surface of the table top 1 is provided with a knife groove 31 at the position close to the cutting knife 29, the front side of the second support column 5 at the front side is fixedly connected with a third box body 32, the inside of the third box body 32 is provided with a second motor 33, the right end of the upper surface of the table top 1 is provided with a fixing seat 35, the upper surface of the fixing seat 35 is fixedly provided with a third motor 36, the right end of the third motor 36 is rotatably connected with a fourth rotating shaft 37, and the outer surface of the fourth rotating shaft 37 is fixedly provided with a grinding wheel 38.

Wherein, one side of the limiting cylinder 11 close to the gear 10 is provided with a meshing hole 15, and one side of the limiting cylinder 11 close to the second lifting hole 17 is provided with a first lifting hole 16.

Wherein, the shape of crank 18 is L shape structure, and two direction switch 4 and second motor 33 electric connection, through two direction switch 4 regulation and control second motor 33 just reversing and then control turning to of lead screw 23, make connecting block 25 can drive second box 26 reciprocating motion, and then realize the reciprocating cutting motion of cutting knife 29, two direction switch 4's model is HY23, lamp switch 22 and lamp 21 electric connection.

Wherein, second connecting rod 24 is located the below of lead screw 23, and second connecting rod 24 and connecting block 25 sliding connection, lead screw 23 and connecting block 25 threaded connection.

Wherein, one side of the second motor 33 close to the screw 23 is rotatably connected with a third rotating shaft 34, and the third rotating shaft 34 is fixedly connected with the screw 23.

Wherein, the equal fixedly connected with supporting leg 39 in lower surface four corners position of desktop 1, the lower extreme of four supporting legs 39 is equipped with second rubber pad 40, and second rubber pad 40 prevents that the workstation from sliding, makes the more stable of workstation.

Example two:

referring to fig. 2-7, an assembling device for machining a workbench component comprises a table top 1, wherein a plurality of first supporting columns 2 are fixedly connected to the left end of the upper surface of the table top 1, a plurality of first box bodies 3 are fixedly connected to the right side of the first supporting columns 2, a reversing switch 4 is installed on the right side of the first box bodies 3 on the upper surface of the table top 1, a plurality of second supporting columns 5 are fixedly connected to the rear side of the reversing switch 4 on the upper surface of the table top 1, first connecting rods 7 are arranged among the first supporting columns 2, fixing rods 14 are arranged among the first box bodies 3, a supporting frame 8 is fixedly connected to one end, far away from the fixing rods 14, of the inner wall of the bottom of each first box body 3, a first rotating shaft 9 is rotatably connected to the inner surface of the upper end of the supporting frame 8, a gear 10 is fixedly connected to the outer surface of the first rotating shaft 9, a second lifting hole 17 is formed in one side, close to the fixing rods 14, of the first box bodies 3, a limiting cylinder 11 is arranged at a position, close to a second lifting hole 17, of the inner wall of the bottom of the first box body 3, a lifting column 12 is arranged inside the limiting cylinder 11, a plurality of tooth grooves 13 are formed in one side, close to the gear 10, of the lifting column 12, the bottom of one side, close to the second lifting hole 17, of the lifting column 12 is fixedly connected with a fixing rod 14, one end, far away from the first box body 3, of the first rotating shaft 9 is fixedly connected with a crank 18, one end, far away from the first rotating shaft 9, of the crank 18 is rotatably connected with a rotating sleeve 19, a first rubber pad 20 is arranged on the lower surface of the fixing rod 14, a lamp 21 is arranged on the lower surface of the first connecting rod 7, a lamp switch 22 is arranged on the outer surface of the upper end of the first support 2, located on the front side, a lead screw 23 is rotatably arranged among a plurality of second support columns 5, a plurality of second connecting rods 24 are fixedly connected among the second support columns 5, and the lead screw 23 and the same connecting block 25 is arranged on the outer surfaces of the second connecting rod 24, the lower surface of the connecting block 25 is provided with a second box body 26, the inside of the second box body 26 is provided with a first motor 27, one side of the first motor 27 is rotatably connected with a second rotating shaft 28, one end of the second rotating shaft 28 far away from the first motor 27 is fixedly connected with a cutting knife 29, the function of cutting workpieces is added for a workbench, workpieces with different sizes can be cut and corrected, so that the workpieces can be better assembled, the quality hidden trouble caused by forced assembly is avoided, the lower surface of the second box body 26 is provided with a knife hole 30 at the position close to the cutting knife 29, the upper surface of the table top 1 is provided with a knife groove 31 at the position close to the cutting knife 29, the front side of the second support column 5 at the front side is fixedly connected with a third box body 32, the inside of the third box body 32 is provided with a second motor 33, the right end of the upper surface of the table top 1 is provided with a fixing seat 35, the upper surface of the fixing seat 35 is fixedly provided with a third motor 36, the right end of the third motor 36 is rotatably connected with a fourth rotating shaft 37, and the outer surface of the fourth rotating shaft 37 is fixedly provided with a grinding wheel 38.

Wherein, the equal fixedly connected with support column 41 in lower surface four corners position of desktop 1, sleeve 42 has all been cup jointed to the lower extreme surface of four support columns 41, a plurality of fixed orificess 43 have all been seted up with sleeve 42's internal surface to support column 41, sleeve 42's lower extreme is equipped with second rubber pad 40, and fixed round 43 inside fixed pin 6 that is equipped with on the sleeve 42, fixed pin 6's shape is the U-shaped structure, height-adjustable function has been increased for the workstation, the fixed pin 6 of U-shaped, can inject two fixed orificess 43 simultaneously, make the connection between support column 41 and the sleeve 42 more stable, the security has been improved.

The working principle is as follows: when the cutting device is used, the second support column 5, the second connecting rod 24, the lead screw 23, the second rotating shaft 28, the cutting knife 29 and the first motor 27 are arranged, the first motor 27 drives the second rotating shaft 28 to rotate, the cutting knife 29 is further driven to rotate, the function of cutting a workpiece is added for a workbench, the workpiece with a deviation size can be cut and corrected, so that the workpiece can be better assembled, the quality hidden trouble caused by forced assembly is avoided, the forward and reverse rotation of the second motor 33 is regulated and controlled through the reversing switch 4, the lead screw 23 is further controlled to rotate, the connecting block 25 can drive the second box body 26 to reciprocate, the reciprocating cutting motion of the cutting knife 29 is further realized, the first support column 2, the first connecting rod 7 and the lamp 21 can provide an excellent assembly environment through illumination, and the first box body 3, the fixing rod 14, the lifting column 12, the tooth groove 13, the gear 10, The support frame 8, the first rotating shaft 9 and the crank 18 add a mechanical tightening function to the workbench, the first rotating shaft 9 is driven to rotate by rotating the crank 18, so that the gear 10 rotates, the lifting column 12 moves up and down by meshing the gear 10, the lifting column 12 drives the fixing rod 14 to move up and down, when a plate workpiece is corrected, tightening can be performed through the fixing rod 14, labor is saved, safety is improved, the rotating sleeve 19 enables the crank 18 to rotate more conveniently, the first rubber pad 20 can protect the workpiece and prevent the workpiece from slipping during cutting, in addition, the fixing seat 35, the third motor 36, the fourth rotating shaft 37 and the grinding wheel 38 add a function of fine trimming the workpiece to the workbench, particularly, the workpiece after cutting is performed, the third motor 36 can drive the fourth rotating shaft 37 to rotate, so that the grinding wheel 38 rotates and is ground through the grinding wheel 38, make the cutting opening level and smooth, in the time of convenient assembly, avoided cutting opening fish tail workman, through having set up support column 41, sleeve 42, fixed orifices 43 and fixed pin 6 for the workstation has increased height-adjustable function, the fixed pin 6 of U-shaped can inject two fixed orifices 43 simultaneously, makes the connection between support column 41 and the sleeve 42 more stable, has improved the security, and second rubber pad 40 prevents that the workstation from sliding, makes the more stable of workstation, the utility model discloses a workstation has the function of revising the work piece that has the deviation when carrying out the work piece assembly, the height-adjustable of while workstation, facilitates the use more.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. An assembling device for machining of a workbench component comprises a desktop (1) and is characterized in that a plurality of first supporting columns (2) are fixedly connected to the left end of the upper surface of the desktop (1), a plurality of first box bodies (3) are fixedly connected to the right side of the first supporting columns (2) of the upper surface of the desktop (1), a reversing switch (4) is installed on the right side of the first box bodies (3) of the upper surface of the desktop (1), a plurality of second supporting columns (5) are fixedly connected to the rear side of the reversing switch (4) of the upper surface of the desktop (1), first connecting rods (7) are arranged between the first supporting columns (2), fixing rods (14) are arranged between the first box bodies (3), a supporting frame (8) is fixedly connected to one end, far away from the fixing rods (14), of the inner wall of the bottom of the first box body (3), and a first rotating shaft (9) is rotatably connected to the inner surface of the upper end of the supporting frame (8), the outer surface of the first rotating shaft (9) is fixedly connected with a gear (10), one side, close to the fixing rod (14), of the first box body (3) is provided with a second lifting hole (17), the position, close to the second lifting hole (17), of the inner wall of the bottom of the first box body (3) is provided with a limiting barrel (11), a lifting column (12) is arranged inside the limiting barrel (11), one side, close to the gear (10), of the lifting column (12) is provided with a plurality of tooth grooves (13), the bottom of one side, close to the second lifting hole (17), of the lifting column (12) is fixedly connected with the fixing rod (14), one end, far away from the first box body (3), of the first rotating shaft (9) is fixedly connected with a crank (18), one end, far away from the first rotating shaft (9), of the crank (18) is rotatably connected with a rotating sleeve (19), the lower surface of the fixing rod (14) is provided, the lower surface of the first connecting rod (7) is provided with a lamp (21), the outer surface of the upper end of the first support column (2) positioned on the front side is provided with a lamp switch (22), a plurality of second support columns (5) are rotatably provided with a lead screw (23), a plurality of second connecting rods (24) are fixedly connected between the second support columns (5), the outer surfaces of the lead screw (23) and the second connecting rods (24) are provided with the same connecting block (25), the lower surface of the connecting block (25) is provided with a second box body (26), a first motor (27) is arranged inside the second box body (26), one side of the first motor (27) is rotatably connected with a second rotating shaft (28), one end of the second rotating shaft (28) far away from the first motor (27) is fixedly connected with a cutter hole (29), and a cutter hole (30) is formed in the position, close to the lower surface of the second cutter box body (26), close, the utility model discloses a table top, including desktop (1), cutting knife (29), sword groove (31) have been seted up to the position that the upper surface of desktop (1) is close to cutting knife (29), is located the front side fixedly connected with third box (32) of second pillar (5), the inside of third box (32) is equipped with second motor (33), the upper surface right-hand member of desktop (1) is equipped with fixing base (35), the last fixed surface of fixing base (35) installs third motor (36), the right-hand member of third motor (36) rotates and is connected with fourth pivot (37), the external fixed surface of fourth pivot (37) installs emery wheel (38).

2. The assembling device for machining the workbench assembly as recited in claim 1, wherein a meshing hole (15) is formed at one side of the limiting cylinder (11) close to the gear (10), and a first lifting hole (16) is formed at one side of the limiting cylinder (11) close to the second lifting hole (17).

3. The assembling device for machining the workbench assembly as recited in claim 1, wherein the crank (18) is in an L-shaped structure, the reversing switch (4) is electrically connected with the second motor (33), the reversing switch (4) is in HY23 type, and the lamp switch (22) is electrically connected with the lamp (21).

4. The assembling device for machining of working table components as claimed in claim 1, characterized in that the second connecting rod (24) is located below the lead screw (23), the second connecting rod (24) is connected with the connecting block (25) in a sliding mode, and the lead screw (23) is connected with the connecting block (25) in a threaded mode.

5. The assembling device for machining the working table component as claimed in claim 1, wherein a third rotating shaft (34) is rotatably connected to one side, close to the screw rod (23), of the second motor (33), and the third rotating shaft (34) is fixedly connected with the screw rod (23).

6. The assembling device for machining the workbench assembly as recited in claim 1, wherein four corners of the lower surface of the desktop (1) are fixedly connected with supporting legs (39), and the lower ends of the four supporting legs (39) are provided with second rubber pads (40).

7. The assembling device for machining the workbench assembly according to claim 1, wherein four corners of the lower surface of the desktop (1) are fixedly connected with support columns (41), sleeves (42) are sleeved on the outer surfaces of the lower ends of the four support columns (41), a plurality of fixing holes (43) are formed in the inner surfaces of the support columns (41) and the sleeves (42), second rubber pads (40) are arranged at the lower ends of the sleeves (42), fixing pins (6) are arranged in the fixing holes (43) in the sleeves (42), and the fixing pins (6) are in U-shaped structures.